2) mouth-piece tape
口罩带
3) Earmuff
[英]['ɪəmʌf] [美]['ɪr'mʌf]
耳罩
1.
Objective To observe the sound attenuation effect of several kinds of hearing protectors (earplugs and earmuffs) in an infrasound generator sound field.
目的观察几种护耳器 (耳塞、耳罩 )对次声发生器次声场的隔声效果。
2.
Comparing the Sound Reduction Attenuation of Three Types of Earmuffs with REAT Method;
结果 国内与国外耳罩声衰减值从 0 。
4) circumaural earphone
耳罩式耳机
5) active headset
有源耳罩
1.
Most of active headsets, which use fixed analog feedback controllers, are not able to maximize the noise reduction.
目前有源耳罩大都采用固定的模拟反馈控制器,不能够最大限度地消除低频噪声。
2.
In this paper, the characteristics, development and the state of the art of the active headset are discussed, and then the structure, algorithm and engineering implementation for analogue and digital active headset are investigated respectively.
有源耳罩作为有源噪声控制技术一个重要的应用方向,已经取得了许多的成果。
6) noise cancellation earmuff
消声耳罩
补充资料：口罩
（～儿）卫生用品，用纱布等制成，罩在嘴和鼻子上，防止灰尘和病菌侵入。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条